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Fossil group of galaxies shows dearth of low luminosity members
Galaxy Clusters...
Compact Galaxy Cluster HCG 87 - Gemini Observatory Image
Gemini North probes the gas, dust and stars at the center of the active galaxy NGC 1068
NGC 1068 The Closest Active Galactic Nucleus
Artist's conception of what the environment surrounding the black hole in NGC 1068 might look like. Gemini artwork by Jon Lomberg